Autolevel Z-probe mount and arm for Velleman K8200 / 3Drag (5g servo)

# Overview
Designed to fit a microservo (5g) and to position the probe (microswitch) closely to the hotend ([E3D v6 on my mount](http://www.thingiverse.com/thing:2055600) in particular).

Cutout for servo's arm (the small OEM one) is slightly undersized and may require enlargening after printing (or trimming the arm).

# Assembly
To assemble, you'll additionally need:
* M5x15 screw, M5 washer and square M5 nut (for attaching mount to printer)
* M2x12 screw and M2 nut (for attaching servo